[2164] Rename method to getRRsigDataCount() and add it to AbstractRRset's interface

BasicRRset implements a dummy getRRsigDataCount() which returns 0
(as getRRsig() returns NULL without throwing).

The method was renamed different to what is asked in the bug, so that
the new name is consistent with other AbstractRRset methods for RRSIGs.

src/lib/dns/rrset.cc

@@ -250,7 +250,7 @@ RRset::RRset(const Name& name, const RRClass& rrclass,
 RRset::~RRset() {}
 
 unsigned int
-RRset::getSIGRdataCount() const {
+RRset::getRRsigDataCount() const {
     if (rrsig_) {
         return (rrsig_->getRdataCount());
     } else {

src/lib/dns/rrset.h

@@ -420,6 +420,15 @@ public:
     /// \return Pointer to the associated RRSIG RRset or null if there is none.
     virtual RRsetPtr getRRsig() const = 0;
 
+    /// \brief Returns the number of \c RRSIG records associated with
+    /// the \c RRset.
+    ///
+    /// Note that an \c RRset with no RRSIG records may exist, so this
+    /// method may return 0.
+    ///
+    /// \return The number of \c RRSIG records associated.
+    virtual unsigned int getRRsigDataCount() const = 0;
+
     /// \brief Adds RRSIG RRset RRs to the associated RRSIG RRset
     ///
     /// Adds the (assumed) RRSIG rdata the RRSIG RRset associated with this
@@ -764,6 +773,15 @@ public:
         return (RRsetPtr());
     }
 
+    /// \brief Returns the number of \c RRSIG records associated with
+    /// the \c RRset.
+    ///
+    /// \return Always returns 0. Associated RRSIG RRsets are not
+    ///         supported in this class.
+    virtual unsigned int getRRsigDataCount() const {
+        return (0);
+    }
+
     virtual void addRRsig(const rdata::ConstRdataPtr&) {
         isc_throw(NotImplemented,
                   "BasicRRset does not implement the addRRsig() method");
@@ -810,15 +828,6 @@ public:
 
     virtual ~RRset();
 
-    /// \brief Returns the number of \c RRSIG records associated with
-    /// the \c RRset.
-    ///
-    /// Note that an \c RRset with no RRSIG records may exist, so this
-    /// method may return 0.
-    ///
-    /// \return The number of \c RRSIG records associated.
-    unsigned int getSIGRdataCount() const;
-
     /// \brief Updates the owner name of the \c RRset, including RRSIGs if any
     virtual void setName(const Name& n) {
         BasicRRset::setName(n);
@@ -878,6 +887,15 @@ public:
     /// \brief Return a pointer to this RRset's RRSIG RRset
     virtual RRsetPtr getRRsig() const { return (rrsig_); }
 
+    /// \brief Returns the number of \c RRSIG records associated with
+    /// the \c RRset.
+    ///
+    /// Note that an \c RRset with no RRSIG records may exist, so this
+    /// method may return 0.
+    ///
+    /// \return The number of \c RRSIG records associated.
+    virtual unsigned int getRRsigDataCount() const;
+
 private:
     RRsetPtr rrsig_;
 };

src/lib/dns/tests/message_unittest.cc

@@ -764,9 +764,7 @@ TEST_F(MessageTest, toWireSigned) {
                                          "20000101000000 20000201000000 "
                                          "12345 example.com. FAKEFAKEFAKE"));
     rrset_a->addRRsig(rrset_rrsig);
-
-    const RRset* rr = dynamic_cast<const RRset*>(rrset_a.get());
-    EXPECT_EQ(2, rr->getSIGRdataCount());
+    EXPECT_EQ(2, rrset_a->getRRsigDataCount());
 
     message_render.addRRset(Message::SECTION_ANSWER, rrset_a, true);
 

src/lib/dns/tests/rrset_unittest.cc

@@ -339,9 +339,9 @@ TEST_F(RRsetRRSIGTest, addRRsig) {
     EXPECT_EQ(3, sp->getRdataCount());
 }
 
-TEST_F(RRsetRRSIGTest, getSIGRdataCount) {
-    EXPECT_EQ(1, rrset_aaaa->getSIGRdataCount());
-    EXPECT_EQ(0, rrset_a->getSIGRdataCount());
+TEST_F(RRsetRRSIGTest, getRRsigDataCount) {
+    EXPECT_EQ(1, rrset_aaaa->getRRsigDataCount());
+    EXPECT_EQ(0, rrset_a->getRRsigDataCount());
 
     rrset_rrsig = RRsetPtr(new RRset(test_name, RRClass::IN(),
                                      RRType::RRSIG(), RRTTL(3600)));
@@ -354,9 +354,9 @@ TEST_F(RRsetRRSIGTest, getSIGRdataCount) {
                                          "20000101000000 20000201000000 "
                                          "12345 example.com. FAKEFAKEFAKE"));
     rrset_a->addRRsig(rrset_rrsig);
-    EXPECT_EQ(2, rrset_a->getSIGRdataCount());
+    EXPECT_EQ(2, rrset_a->getRRsigDataCount());
 
     rrset_a->removeRRsig();
-    EXPECT_EQ(0, rrset_a->getSIGRdataCount());
+    EXPECT_EQ(0, rrset_a->getRRsigDataCount());
 }
 }